Tube socket



M. GUETT TUBE SOCKET June 21, 1927.

Filed Feb. 28. 1925 Patented June 21? 1927.

UNITED .TATES PATENT OFFICE.

MONROE GUETT, OF HARTFORD, CONNECTICUT, ASSIGNOR TO HART & HEGEMAN MANUFACTURING COMPANY, OF HARTFORD, CONNECTICUT, A CORIORATION OF CONNECTICUT.

TUBE SOCKET.

Application filed February 28, 1925. Serial No. 12,278.

The object of my inventionis to improve the construction of sockets for the vacuum tubes of radio apparatus, so that the vacuum tubes can be located in the sockets without straining the spring contact plates at the base of the sockets and insuring an electrical connection between the plates and the terminals of the tubes.

In the accompanylng drawings: 1 Fig. '1 is a perspective view of the tube socket, partly broken away to illustrate my.

invention; 3

Fig. 2 is a plan view; Fig. 3 is asectional view on the line 3-3, Fig. 2;

Fig. 4. is a sectional view on the hue 4.4, Fig. 2;

Fig. 5 is a perspective-view of one of the spring contact plates; and

Fig. 6 is a perspective view of one of the stop plates.

The base 1 of the socket has a tubular extension 2, which receives the base of the vacuum tube. The opening in the socket extends entirely through the extension and the base, as illustrated in Fig. 2.

' In, the side wall of the extension is a verti-- cal groove 3, which is reduced in width at the upper end, as at 4, and has a notch 5 in the overhanging portion.

The base of the tube has a pin at one side, which is of sucli a diameter that it will pass freely through the narrow portion 4 of the groove. On turning the tube, the pin passes under the overhanging portion so that, when released, the pin assumes a position in the notch 5, locking the tube in the socket.

In the lower portion of the opening in the socket are spring contact plates 6, which 40 extend from binding posts 7 that are mounted in the base 1. These spring plates are adapted to recesses 8 inthe underside of the base, as shown clearly in Fig. 4:. As the groove 3 extends entirely through the socket, the vertical movement within the tube is limited only by the spring contact plates in the ordinary form of socket.

In many instances, carelessness in secur ing the tubes within the sockets strains the springs beyond their elastic limit so that they do not spring back-to engage the contact points of the tubes properly and to hold the tube with its point within the notch 5 of the socket.

To overcome this defect, heavy non-elastic plates 9 are secured to the binding posts 7 directly under the spring contact plates 6. These non-elastic plates 9 act as stops to limit the downward movement of the spring plates 6, and prevent the accidental straining of the spring plates, thereby insuring proper contact with the terminals of the sockets and the locking of the tube within the socket.

While a rigid plate is illustrated under each spring contact plate 6, the rigid plates can be located under one or more spring contact plates without departing from the essential feature of the invention, which is to limit the inward movement of the tube socket.

I MONROE GUETT. 

